lucid-ui/lib/components/Paginator/Paginator.reducers.spec.js

A UI component library from AppNexus.

import assert from 'assert';
import * as SingleSelect from '../SingleSelect/SingleSelect.reducers';
import { onPageSelect, onPageSizeSelect } from './Paginator.reducers';
jest.mock('../SingleSelect/SingleSelect.reducers');
describe('Paginator reducers', function () {
  var initialState = {
    selectedPageIndex: 1,
    selectedPageSizeIndex: 0,
    SingleSelect: {}
  };
  var totalPages = 5;
  describe('onPageSelect', function () {
    it('should set the selectedPageIndex to the payload', function () {
      var pageIndex = 2;
      var nextState = onPageSelect(initialState, pageIndex, totalPages);
      assert.equal(nextState.selectedPageIndex, pageIndex, "must be ".concat(pageIndex));
    });
    it('should set the selectedPageIndex to 0 if payload < 0', function () {
      var pageIndex = -1;
      var nextState = onPageSelect(initialState, pageIndex, totalPages);
      assert.equal(nextState.selectedPageIndex, 0, 'must be 0');
    });
    it('should not exceed totalPages', function () {
      var pageIndex = 5;
      var nextState = onPageSelect(initialState, pageIndex, totalPages);
      assert.equal(nextState.selectedPageIndex, 4, 'must be 4');
    });
  });
  describe('onPageSizeSelect', function () {
    beforeEach(function () {
      return SingleSelect.onSelect.mockClear();
    });
    it('should set the selectedPageIndex to 0', function () {
      var pageIndex = 2;
      var nextState = onPageSizeSelect(initialState, pageIndex);
      assert.equal(nextState.selectedPageIndex, 0, 'must be 0');
    });
    it('should call SingleSelect.onSelect with state.SingleSelect and selectedPageSizeIndex', function () {
      var pageIndex = 2;
      onPageSizeSelect(initialState, pageIndex);
      expect(SingleSelect.onSelect).toHaveBeenCalledWith(initialState.SingleSelect, pageIndex);
    });
    it('should set state.SingleSelect to the return value of SingleSelect.onSelect', function () {
      var mockValue = {};
      var pageIndex = 2;

      SingleSelect.onSelect = function () {
        return mockValue;
      }; // eslint-disable-line no-import-assign


      var nextState = onPageSizeSelect(initialState, pageIndex);
      assert.strictEqual(nextState.SingleSelect, mockValue, 'must be `mockValue`');
    });
  });
});